Silicon-based tunable polarization rotator

Abstract

The invention discloses a silicon-based tunable polarization rotator. The silicon-based tunable polarization rotator is characterized in that: the design and production of the silicon-based tunable polarization rotator are based on the planar optical waveguide technology and the semiconductor technology, and the dynamic tunable conversion between TEO and TMO polarization states in waveguide can be achieved. The tunable polarization rotator mainly comprises three functional devices, namely, 101, a symmetry polarization rotation separation device, 102, a phase shift arm and 103, a reversely symmetry polarization rotation separation device, wherein the structure of the functional device 101 can be realized through an adiabatic coupler or an asymmetric double-layer taper, and a symmetric branch; the functional device 102 can be electro optic and thermo-optic in structure; the structure of the functional device 103 can be achieved through an adiabatic coupler or an asymmetric double-layer taper, and a symmetric branch. Compared with various conventional tunable polarization rotators, the silicon-based tunable polarization rotator has the advantage of CMOS compatibility based on the silicon-based planar optical waveguide technology; the device is simple in structure and production technology.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology and planar optical waveguide integration, and relates to a silicon-based adjustable polarization rotation device. Background technique [0002] In recent years, in order to break through the limitation of "electronic bottleneck", photon has been widely regarded as a new information carrier. In the field of long-distance communication, optical communication has achieved great success with the advantages of high bandwidth and low loss; with the development of technology, optical communication will develop towards higher integration density and shorter transmission distance, that is, the scale of optical devices and monolithic integration. Due to the advantages of silicon materials such as large wafer area and CMOS process compatibility, the scheme of using silicon waveguide system to realize integrated optics has attracted more and more attention. At present, a variety of passive devices a...

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Problems solved by technology

[0006] In view of this, the present invention solves the shortcomings of the traditional adjustable polarization rotation device with complex structure and excessive device size, and intends to use a symmetrical polarization rotation separation device, a phase shift arm and a reverse symmetrical polarization rotation separation device in a silicon-based waveguide. structure, using the thermo-optic or electro-optic effect of silicon waveguides to realize a dynamically tunable polarization rotation device between TE0 and TM0

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